Machine eor mounting tires on sealing rings



R.'BRUSHW1LER AND Afoo. MACHINE FOR MOUNTING TIRES 0N SEALING RINGS APPLICATION FILED FEB. 4. 192|.

R. lBRUSHIVILER AND A. OTTO.

' MACHINE FOR MOUNTING TIRES 0N SEALING RINGS.

APPLICATION FlLED FEB. 4. 1921.

-ASLSSG, Y Panama OCI. 10,119.22?

4 SHEETS-SHEET 2.

THEIR ATbRNI-:v

R. BRUSHWILER AND A. OTTO. MACHINE FOIIMYONTING TIRES 0N SEALING RINGS. APPucATloN man mm. 1921.

1,431,366. Pand oet. 10,1922.

4 SHEETS-SHEET 3 1- B. BRUSHWILl- R AND A. GTTO.

MACHINE FOR MOUNTING TIRES 0N SEALING RINGS. APPLlcATloN FILED FEH.4. 192|.

15.41.366. v I Patented Oct. l0, i922.,

. 4 sHEETs-sHEET 4. I l 6 TEUR ATTORNEY.

Patented Oct. 10, 1922.

UNITED ROBERT." BRUSIVVI'IZJEIB,Jv ANDlALBERT OTTO; 0F" DIli'IIQOIT,` M'ICI-IIGrANy ASSIGNORS TO MORGAN @t WRIGHT, A CORPORATION OF MICHIGAN.

NIACHINE FOR MOUNTING TIRES ON SIELLIINTGy RINGS.

Afpplica'tionfiled February 1L, 1921. Serial No. 442,374.

To all' whom it may. concern: j

Be it known that we, ROBERT BRUSH- Winnn and ALBERT OTTO, both citizeiisof the United States, andrcsidents of. Detroit, county of Wayne, Statef of Michigan, and Detroit, county n of Vayne .State ofl Michi gan, respectively,vr havewinvented new and useful` Improvements in. Machines for Mounting'Tires on- Sealing` Rings, of which the,- followiiig, isA a. ful-l;J clear,. and. exact dei script-ion. 1

This invention relates tothe manufacture of tires, andi more4 particularly to. apparatus for assemblingl tires: on sealing rings, prelimina-ry tovtheir cure.

In one' method of curing pneumatic. tires internally under fiuid` pressurerduring the heat, the bottom of themold cavity is closed by a sealing ring onwhich the tire has been mounted by distension ofits` beads, the latter being normally (when, buil-t and before cure) of less diameter than the seats on j the sealing ring. Heretofore the beads of the carcass have been mounted `on the` sealing ring by a laboriousmethod. After introducing the. sealing ring withinthe' carcass by spreading its beads, rings withV inclined surfaces were seated on the sides of the sealhammered away at the 'beads to shift them up the inclined surfaces of. the side" rings onto the sealing ring, first one side being mountedand then the other.V This old practive was objectionable. The operati-ves whacked their hands and injured the carcass. Also', the operation was slow and expensive.

The present invention aims to provide Va machine that will enable tires to beniounted on seal-ing rings expeditiously, cheap-ly, and Without intolerable injury to their beads.

lVith the construction illustrated in the drawings in mind, and without intention to limit the scope of the invention more than is required by the prior art, it may be said to consist in a series of chucks for holding seal-ing rings with wedge rings on both sides thereof up the inclined surfaces of which the bea-ds of a tire may be forced by shifting rollers while one of the chucksl is rotated in cooperative relationv therewith'. rlfhree separate chucks are provided,l and While the beads of a tire are being mounted on a sealing ring supported by one chuck, anv operative at a second chuck'isinitially assembling .with only one of three arms of a. swivel framel shown, parts being broken away and sectioned` to better illustrate the construction.

Fig. 2 isa section on the line 2-2, Fig. l showing in detail a latching mechanism for holdingl one of the chucks in cooperative relation with bead shifting mechanism.

Fig. 31 is a plan view of the apparatus.

F ig. d is a detail in vertical section of one of the bead shifting rollers showing a swiveled support therefor. Fig. 5 shows in vertical section, and partly in quarter section, details of a chuck and of bead shifting rollers at substantially the completion of a mounting operation.

4Fig. Gisa section Aon the line 6-6, Fig. 5, showing details of an adjustment for the lower set of bead shifting rollers.

Fig. 7 shows a. chuck after it has been shifted axially or lifted to facilitate enclosing a tire about the assembled sealing and side rings, and

Fig. 8 illustrates the position assumed by the tire after the chuck has been lowered upon the bottom set of bead shifting rollers` but before seating' of 'the tire beads on the sealing ring.

Referring more particularly to Figs. l and 3, from the base or pedestal l rises a column or post 2y to which is swiveled asv indicated at 3 the tubular portion of a frame 4 having a plurality of arms 5, preferably three, each of which carries a chuck indicated generally by the numeral t5. The

lchucks 6 are of identically the saine contary movement between the tire and the bead shifting mechanism. While either might be rotated, it is preferred to rotate the tire, and for this purpose each of the chucks 6 is adapted to be rotatech when in cooperative relation With bead shifting mechanism7 by the main shaft 1G, Fig. 1, journaled in the stationary base 1. This main shaft may be operated in any suitable manner as by a belt (not shown) or by a motor indicated at 11. The armature of the motor may be geared as illustrated to the intermediate and slidable member 1:2 of a friction clutch Whose flanking discs 13 and 14E are pinned and feathered respectively to the shaft 10, power the drive or torque of shaft 10 being no greater than the friction imposed by an adjustable spring 15 urging the several discs together. On the opposite end of the shaft 10 is a broad faced pinion 1G in mesh with a gear 17 on a shaft 18 carrying one part 19 of a clutch and journaled in a bearingv E20 that is slidably mounted in Ways 21, see Fig. 2. in the projecting portion 1 of the base. Normally the clutch part 19 is held coupled to a clutch part 19 by a spring 22 which operates a lever 23 connected to the bearing 20. A foot lever 211 and link 25 afford means for overcoming the spring 22 and disengaging the clutch parts.

The bearing 20, see Fig. 2, has a vertically extending notch 26 flanked by inclined surfaces 27 and each arm 5 of the siviveled frame 4E has a depending integral lug 28 With a tongue 29 that is adapted to enter the notch 26 and thushold the frame against rotation, and in a position such that the chuck it carries is in aligned cooperative relation with an upper set of bead shifting rollers. The clutch part 19 is connected through bevel gearing 30 to a sleeve 31 supported by an arm 5 and feather-keyed as indicated at 32 to a spindle that carries a chuck. lith the tongue 29 of any one of the arms 5 seated in the notch 26 and the clutch parts 19--19 engaged. the chuck carrying shaft 33 that is borne by that particular arm may be rotated from the main shaft 10.

Referring to Fig. 5, each chuck G is shown to consist of a casting or spider having a hub 3,4 keyed as indicated at 35 to the upper enlarged end of the shaft 33. From the hub portion 34. radiate spokes preferably three, but more if desired. each of which is' threaded to receive a tubular member orl sleeve 37 that is provided both externally and internallyv with threads, the latter of which cooperate with the threaded ends of an arm 38. Arm 38 of each chuck at its outer free end carries a jaw or plate 39 having a flange 40 and an inwardly extending pin 1-1, which latter is adapted to enter a socket l2 provided in the relatively fixed spoke 36. In axial alignment with the threaded sleeve 37, and adjacent the spindle 33, is a bevel gear L13 which is also journaled in the spoke 36 and has a finger fai-Ll: that is adapted to enter a slot cu t lengthwise through the threads on the sleeve 37 to an extent indicated by the numeral 45. Bevel gear lis in mesh vvith bevel gear el@ that is journaled on the chuck spindle 33 and has keyed to itv as indicated at 47 a hand wheel 1.8. Covering the bevel gear L16 and between the saine and the hand Wheel 48 is a housing` 419 that prevents entrance of dust and dirt and the operator from chance mutilation of his fingers.

ils the external and internal threads on the sleeve 37 are oppositely inclined (that is, one is right handed and the other is left handed) and as the stem 38 is prevented from rotating by the finger l1 that is socketed in the relatively fixed spoke 36, rota-' tion of the hand Wheel e8 will result in rapidly advancing or retracting the arms 38 of each of the three chuck spokes Whose bevel gears L13 are all in mesh With the hand wheel Vgear Ll-G and consequently enable the jaws 39 to grip bead expanding rings 7 and a sealing ring 8 that have been previously positioned loosely thereabouts.

Straight sided tires with inextensible beads are difficult to assemble even loosely,`

so as to enclose the sealing ring With its flanking Wedge rings. To facilitate the loose enclosure of the several rings' by the tire or carcass, it has been found desirable to lift the chuck clear of its frame arm 5 Where ac-.

cess to both sides of the ring is free and unobstructed, as shown in Fig. 7. lllhile this may be accomplished in variousxvays, it is preferred to locate in axial alignment with one of the chuck spindles 33 (when the frame 4l` is held by the latching mechanism illustrated in Fig. 2) a plunger 50 having a cupped extremity 50. On the rear of the piston 50 operates a coil spring and this end of the cylinder is vented into the atmosphere as indicated at To the space indicated by the numeral 54; of the front side at the piston, fluid, such as air or Water under pressure. be admitted through any suitable type of valve indicated at 55. Which is normally held closed by a spring (not shown) so as to cut off the supply from a line 56, the valve being operable by a foot treadle indicated at 57. Normally the coil spring 52 holds the plunger 50 down, and when it is desired to raise the chuck that has been previously located by the latching mechanism7 the operator depresses treadle 57 to open the valve and apply fluid pressure to the lower end of piston 50 which rises until the shoulder 50 encounters the upper bead of the cylinder 51. The parts are then in the position shovvn in 7 and by spreading the beads of the tire and canting it, 2thesame may be loosely positioned about the nested sealing and wedge rings. `Vlhen this has been done, the treadle 57is released to cut ott the supply of fluid under pressure andexhaust the space 5ft, whereuponthe spring 52 acts in conjunction with gravity to return the piston 50 and the chuck to the position shown in Fig. 8.

After the tire has been spread and inclos'ed about sealing and wedge rings held clamped by a chuclr, it is moved around through an arc oi l2()o to bring it beneath and in aligned cooperative relation with an upper set of bead shifting rollers, a lower set thereof being mounted on each oi the three frame-arms 5. The upper set of bead ring mechanism illustrated in F 2. The

head 58 at its outer free end carries a cylinder' 60, in which reciprocates a piston 6l have lng a depending piston rod 62 that carries the upper set of bead shifting rollers and is in axial 'alignment with a chuck spindle 33 being` at the same distance 'from the axis oli the4 post 2. The piston rod 62 may be moved axially by fluid pressure applied to the sides of its piston 61 and controlled by any suitable type o valve as indicated at 63.

`The lower end of the piston rod 62 has fixed to! it a laterally extending arm 6l which is adapted to move up and down vertically in a slot 64er formed in the vertical face a 'lug 58 integral with the head 56 and by this means, rotation ol the piston rod 62 is prevented without interfering with its recipro cation.

Fixed at about 120o from each other to the lower end of the piston rod 62, are three substantially horizontal pins or rods eachv `of which is adapted to carry a pair ot' bead shifting rollers 66. Each roller 66 is of the construction illustrated 1n crosssection 1n Fig. 4, and 1s rotatably secured to the angular-form post 67, whose upper 68 is swiveled 50 i in the bore of" a yoke 69. A torsion spring 70 has its' opposite extremities anchored in the end 68 of the post and in a cap 7l. the latter being free to turn to anextent limited by its arcuate slot 72. which embraces a pin 73, Fig. 3, integral with the yoke 69. Thus each roller 66 may swivel about a vertical axis to a limited extent against the action of torsion spring.

There are two rollers 66 borne by each yoke 69, one only of whose tubular portions fappears in Fig. 4. Intermediate the pair of rollers 66 the yoke 69 in its upper portion is provided with a tubular projection 741-, see Fig. 5, that tulcrums or swivels on a rod 65. Betweenia nut 7 5 and the abutment tace 76 olZ a member 76 is interposed a coil spring 77. The member 76 is adjustably clamped by a species of split collar and thumb bolt as indicated at 76 to the rod The members 76 may be shifted and the position of the three pairs oi` rollers 66 varied by turning a hand wheel 79 whose hub is machined to form a gear 60 in mesh with a pinion 8l on shaft 62 that is journaled in a part lixed to the piston rod 62 and carries at its lower d end a second pinion 83 in mesh with a rack '64e integral with the member 76. The action oi the spring 77 being limited by a second abutment face 76 on the member 76, the adjustment just described would permit of loeating the three pairs ot rollers 66, that are yieldingly swiveled to the 7 6, further or nearer the axis of the chuck spindle 33. Their swiveled mounting` both about a vertical axis 66, and about a horizontal axis 65, will permit each pair oli rollers 66 to equalize its operation on a bead, as the same is forced up the inclined surfaces or' the side rings by the admission of pressure to the proper side or the piston 6l.

The rollers 66 or the lower set are supported in pairs spaced similarly and in opposition to rollers oli' the upper set and lswiveled in substantially the same manner with the exception that their abutment members 76 ada pted to be simultaneously adjusted in radial directions by pins 85 integral with the members 76 which enter cani slots 66 in a plate 87 that adjustably secured to the exterior ot' a boss 8S which is integral with a iframe arm 5, a hand clamp S9 being provided to clamp the plate 87 in any adjusted position.

O11 the yolres 69 anti-friction rollers 90 are supported tor rotation about a substantially7 horizontal axis and similar rollers 9i are supported by the rods 65 of the lower sot ot bead shitting rollers, these opposed rollers .9D- 91 being designed to maintain lthe tire in symmetrical relation to the sealthe machine Fig. S, through chuck jaws 39 so e and sustain the lower ings The sealing ring the hand wheel as to loosely rece of the two wedge i V8 is then laid on and nested with the lower wedge ring` 7', after which the Lipper wedge ring 7 is positioned on the sealing ring. Then the hand wheel t8 i.' again operated to tightly clamp the assembled rings. rThrough the loot operable valve 55. the plunger 50 is then actuated to raise the chi'ick to the clear and unobstriu'ted position shown in Fig. 7.. in which by spreading the beads the operative may with comparative ease encircle the tire about the rings with its beads loosely seated thereon at the lower lLO .4: nasisee then manipulates the, Valve 63 to bring;` the inarilyv load i l rel: tron with the upper ot bead rollers the tire beads. The lian 1' s oil" the thre i ot upper rollers (5G i'irst tonie in coi v' tn the upper bead oi'l the tire and? swivel about their Vertical axes;v themselves in a position so that their aries olf rotation are substantially radial to the chucl; and consequently also the tire. The tls-nece ot the rollers G6 in their 'further downward more ment engage over the heel ot the bea-1l and torce the upper bead ou the down upon the conical. n'are oit the upper wedge ring;` until the bead linally seats on the sealing;- ring. The downward pressure oli the upper set oit roller causes the chui-lr to more downwardly on its 'feathered i "e connection l, and comnels the lower set o'li rollers to simultaneously press the lower bead ot the tire upward onto the sealing; ri. fluir u; this operation the ot @l5 and Go Contact with the conical .lance ot the wedge rings, and are shifted. iz ally outward.

the tension o l 77, "l, latter insuring ennjz "c ot the beads. ils the chuerc is i rollers while the upper set oit bead Yanced toward the lower "zet, the beads are procfressirelyl shiited to t eir seats on the sealing` ring; throughout the circii et the latter.y and withflnit harmful injiury.

The mounted tire is then. swan out ot the was,7 to the third station inilicated bfi* the letter C, Fie' 3, where the upper we e rino; may be ren'iored and the mounted tire liliewise.

rlhe 'foregoing relates to the preterred construction a d its us lt will be obvious that the trame which carries the chucks may be fixed aojainst increment and tlfe no per set et bead rollers together with the main shaitt and the chuck spinf'lle shitting' cylinder moved relative to the traine such an organization beine a mere reversal olf the preiierrei'l consti ion. liso it r `ll be obvious 'that both sets ot' bead shit mai7 be mounted for inrwenient edi/ewise or that the lowe set alone may be iuorcd edf-fen wise. Still 'furthera the number oli cliucirs the number o? bead shifting rollers may l or deceased as desired. nd would. oe within trie broad principles of he invention to position the chuck support iep; traine tor increment in a `vertical plane, but this we do not deem as desirable as the red construction illustratet in the These and. other changes might la details and in the arrangetu@ rts without departure from the principles ot the invention, and reference saoi'ald tl'iereit'ore be had to the appended claims for a full understandingo 1, flor mounting; tires on sealrings inclridingl in combination, bead l. ripara in alignec cooperative relation wherebyY to eitlect a circuin'terential distensionand se tine; et the heads ot a tire on a sealing rino' pported bjr one chuck while tires and sea rings are being assembled on and removed from the other chucks.

il. Apparatus for mounting' tires on sealrinos including" in combination, bead mechanism including upper and a plurality of chucks, a rotattrame 'for stuyporting' said chucks in 'to be successivelljgT positioned in cooperative r l 'on with the upper of said rollers, bead espandi devices sustained by said chucks, and means tor producing; a relative rotary7 increment between a clinch and the bead shiltii rollers when in cooperative relation whi-irebj to effect a circumferential distension and oit the heads ot a tire on a sealing' Y i supper r-d by one chuck while tires and sealing' rings are being; assembled on ai d removed :trom the other chucks.

Apparatus for mounting tires on sealing including); in combination, bead shittingmechanism including upper and lower rollers a pluralityv ot' chucks, means supporting; said chucks permittingl bodilyY movement thereoit to position aniT one of them in aligninp; cooperative relation with one v0i" said rollers, bead expanding devices sustained br the chucks, and means 'for rotating` a clrezelt while in cooperative aligned relation fith the bead shitting' rollers whereby to effect a circumferential distension and seating; of the beads ot' a tire on a sealing ring 1 y@ aced relation and permitting,` each of them.

supported by one chuck while tires and sealing rings are being assembled on and removed from the other chucks.

4. Apparatus for mounting tires on sealing rings including in combination, bead shifting mechanism including upper and lower rollers, a plurality of chucks`v a rotatable frame for supporting said chucks in spaced relation and permitting each of them successively to be positioned in cooperative relation vwith one of the bead shifting rollers, `bead expanding devices sustained by said chucks, and means for rotating a chuck while in cooperative relation with the bead shifting rollers whereby to effect a circumferential distension and seating of the beads of Va tire `on a sealing ring supported by one chuck while .tires and sealing rings are being assembled on and removed from the other` chucks.

5. Apparatus for mounting tires on sealing rings including in combination, bead shifting mechanism including a plurality of rollers disposed symmetrically about a vertical axis, means for bodily shifting the rollers edgewise in lparallelism with said axis, a plurality of chucks, means for supporting said .chucks in spaced relation and permitting ybodily movement thereof to position anyone of them incoaxial relation with the vertical axes of thel rollers, means for rotating a chuck in such coaxial relation, and bead expanding devices sustained by said chuck.

v6. Apparatus Afor mounting tires on sealing :rings including in combination, bead shifting mechanism, a plurality of chucks,

Abead expanding devices sustained by said chucks, a movable frame rotatably supporting each chuck, a driven -inain shaft revoluble about a fixed axis, actuating trains of mechanisms carried by said frame for rotating each chuck and adapted individually to be engaged and disengaged from driving relation with said mainA shaft and by movement of the frame in locating one of the chucks in cooperative relation with the bead shifting mechanism.

7. In an apparatus for mounting tires on sealing rings, a chuck, a shaft for supporting said chuck, connections for actuating said shaft, and means for shifting said shaft axially independently of its driving connections to facilitate the initial placing of sealing and Wedge rings and tires thereon.

8. In an apparatus for mounting tires on sealing rings, in combination, bead shifting mechanism including rollers adapted to engage opposite beads of a tire, means for bringing the rollers together, a chuck adapted to support a tire loosely enclosing a sealing ring and with its beads in the path of said rollers, and driving connections for said chuck including an axially movable shaft permitting the chuck to shift to equalize the action of the rollers in engaging opposite beads.

9. ln an apparatus for mounting tires on sealing` rings, a vertically arranged shaft, a chuck supported in a substantially horizontal plane by said shaft and haring a plurality of stems, ring holding jaws at the ends of said stems having flanges on their lower margins fer supporting sealing and wedge rings, and means for rotating the shaft.

l0. ln an apparatus for mounting tires on sealing rings, a chuck adapted to support a sealingI ring, means sustained by the chuck at the sides of the sealing ring for expanding the beads of a tire. bead shifting mechanism including rollers each swireled for movement about a vertical axis, and means for producing relative rotation between the chuck and the bead shifting mechanism whereby to effect a circumferential seating of tire beads on a sealing ring.

ll. In an apparatus for mounting 'tires on sealing rings, a chuck adapted to supporta sealing ring, means sustained by the chuck for expanding the beads of a tire, bead shifting mechanism including rollers yieldingly urged radially inward of the chuck, and means for producing relative rotation of the chuck and the bead shifting mechanism whereby to effect a circumferential seating of tirc beads on a sealing ring.

l2. ln an apparatus for mounting tires on sealing rings, a chuck adapted to support a sealing ring, means sustained by the chuck for expanding the be:V ls of a tire, bead shifting mechanism including rollers and swiveled supports 'therefor' spring pressed inwardly and substantially radially of the chuck, and means for producing relative rotation of the chuck and the bead shifting mechanism whereby to effect a circumferential seating of tire beads on a sealing ring.

13. In an apparatus for mounting tires on sealing rings, a chuck adapted to support sealing and wedge rings, means sustained by the chuck for expanding' the beads of a tire. bead shifting mechanism including pairs of rollers and universally movable supports therefor permitting the rollers to accomrnodate themselves to the wedge rings, and means for producing relative rotation of the chuck and the bead shifting mechanism whereby to effect a circumferential seating of tire beads on a sealing ring.

141-. In an apparatus for mountingl tires on sealing rings, a chuck, a shaft for supporting said chuck, connections for actuating said shaft, and means for shifting said shaft axially independently of its driving connections to facilitate the initial placing of sealing rings and tires thereon, said last named means including a fluid pressure actuatable plunger adapted to be operatively aligned with said shaft to shift it endwise.

15. .ln an apparatus -tor mounting tires on sealing rings, in combination, a chuck 'for supporting a sealing ring and bead expanding rings on opposite sides o'l the sealing ring, bead shitting rollers, and means lior producing relative rotary movement andi relative sidewise movement between the bead shitting rollers and the chuck.

16. ln an apparatus tor mounting tires on sealing rings, in combination, a chuck for supporting a sealing ring and head expanding rings on opposite sides ot the sealing ring, bead shittingl mechanism, and means tor producing relative rotary movement and relative sidewise movement between the bead shi iting mechanism and the chuckI said bead shifting mechanism including opposed sets of rollers operable ou opposite sides oit a tire.

17. ln apparatus l'or mounting 'tires on sealing rings, in combination, a chuck for suiliporting a sealing` ring and bead expanding devices contiguous thereto., bead shitting mechanism, and means ifor producing relative rotary movement and relative sidewise movement between the bead shitting mechanism and the chuck, said bead shitting mechanism including opposed sets ot rollers adapted to operate simultaneously on both beads of a tire, and yieldable supports for said rollers adapted to permit automatic movement thereof outward as they traverse the bead expanding devices.

18. ln apparatus for mounting tires on sealing rings, in combination, a chuck for supporting a sealing ring and bead expanding rings on opposite sides ot the sealing ring, bead shitting mechanism, and means tor producing relative rotary movement and relative sidewise movement between the bead shitting mechanism and the chuck, said bead expanding mechanism including opposed sets ot rollers ar. inged in pairs, and sell shittable supports `for said pairs oit rollers permitting them to accommodate themselves both circumi'erentially and radially to the inclined surfaces ot the bead expanding :iframes rings as the bead mounting operation progresses.

19. ln apparatus for mounting tires on sealing rings, in combination, upper and lower sets of bead shifting rollers, means for moving the upper set or rollers towards the lower set, a chuck adapted to hold tire sealing and wedge rings, the latter flanking the former, and to support a tire with its beads loosely positioned on the wedge rings, and means tor rotating said chuck including an axially movable shaft permitting the cnick to shift and equalize the action ot the upper and lower sets of bead rollers.

20. ln apparatus tor mounting tires on sealing rings, a chuck having a plurality of jaws, threaded stems supporting said jaws, means for preventing rotation of each jaw about the axis of its stem, sleeves having internal and external threads the 'former oic which engage the threaded stems, means supporting said sleeves externally, and means for rotating the sleeves to move their stems endwise whereby the position ot the jaws oi the chuck may be positioned to accommodate sealing rings ot different sizes.

2l. In a machine for mounting tires on sealing rings, in combination, a movable trame, chucks supported at intervals by said trame, a set ot lower bead shifting rollers supported by said frame below and in cooperative relation with each chuck, an upper set oi bead shifting rollers supported above the plane ot movement of the chucks, means t'or latching the trame against movement with any one of the chucks and lower set et bead shitting rollers in cooperative aligned relation with the upper set oit bead shitting rollers, and means for rotating a chuck while located in such cooperative aligned relation.

Signed at Detroit, county of `llayne, State ot Michigan, this 26th day of January, 1921.

ROBERT BRUSHVVILER. ALBERT OTTO. 

